Disentangling the influence of neighborhood type and self-selection on driving behavior: an application of sample selection model
- 394 Downloads
The causality issue has become one of the key questions in the debate over the relationships between the built environment and travel behavior. Although previous studies have tested statistical and/or practical significance of the built environment on travel behavior, few have quantified the relative roles of the built environment and residential self-selection in influencing travel behavior. Using 1,479 residents living in four traditional and four suburban neighborhoods in Northern California, this study explores the causal effect of neighborhood type on driving behavior and its relative contribution to the total influence of neighborhood type. Specifically, this study applied Heckman’s sample selection model to separate the effect of the built environment itself and the effect of self-selection. The results showed that, on average, the effect of neighborhood type itself on driving distance was 25.8 miles per week, which accounted for more than three quarters of the total influence of neighborhood type and 16% of individuals’ overall vehicle miles driven. These results suggest that the effect of the built environment on driving behavior outweighs that of self-selection. This paper also discussed the advantages and weaknesses of applying the Heckman’s model to address the self-selection issue.
KeywordsCausality Land use Smart growth Transportation Treatment effect
The data collection was funded by the UC Davis-Caltrans Air Quality Project, the Robert Wood Johnson Foundation, and the University of California Transportation Center. The survey was designed by Susan Handy and Patricia Mokhtarian. Thank Ed Vytlacil for his help on technical issues of sample selection models. Comments from two anonymous referees have greatly improved this paper.
- Babbie, E.: The Practice of Social Research, 8th edn. Wadsworth Publishing Company, Belmont, CA (1998)Google Scholar
- Cameron, A.C., Trivedi, P.K.: Microeconomics: Methods and Applications. Cambridge University Press, New York (2005)Google Scholar
- Cao, X., Mokhtarian P.L., Handy, S.L.: Examining the impacts of residential self-selection on travel behavior: a focus on empirical findings. Transp. Rev. (2009)Google Scholar
- Greene, W.H.: Econometric Analysis, 3rd edn. Prentice-Hall, Inc, Upper Saddle River, NJ (1997)Google Scholar
- Heckman, J.: The common structure of statistical models of truncation, sample selection, and limited dependent variables and a simple estimator of such models. Ann. Econ. Soc. Meas. 5, 475–492 (1976)Google Scholar
- Salon, D.: Cars and the city: an investigation of transportation and residential location choices in New York city. Ph.D. Dissertation, Agricultural and Resource Economics, University of California, Davis (2006)Google Scholar
- Singleton Jr., R.A., Straits, B.C.: Approaches to Social Research, 4th edn. Oxford University Press, New York (2005)Google Scholar
- Sommer, B., Sommer, R.: A Practical Guide to Behavioral Research: Tools and Techniques, 4th edn. Oxford University Press, New York (1997)Google Scholar
- Transportation Research Board and Institute of Medicine.: Does the built environment influence physical activity? Examining the evidence. Washington, DC: Special Report 282 (2005)Google Scholar
- Zhou, B., Kockelman, K.: Self-selection in home choice: use of treatment effects in evaluating the relationship between the built environment and travel behavior. Transp. Res. Record 2077, 54–61 (2008)Google Scholar